Obliging
'obliging' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for agreeable that I've seen before include "Pleasant, pleasing" , "delightful" , "Cordial" , "Pleasant, acceptable" , "Willing - nice" .)
'obliging' is the definition.
(I've seen this before)
This is all the clue.
(Another definition for eager to please that I've seen is " Obliging".)